scholarly journals Production of Recombinant Human Ceruloplasmin: Improvements and Perspectives

2021 ◽  
Vol 22 (15) ◽  
pp. 8228
Author(s):  
Maria Carmela Bonaccorsi di Patti ◽  
Antimo Cutone ◽  
Marek Nemčovič ◽  
Zuzana Pakanová ◽  
Peter Baráth ◽  
...  
Keyword(s):  
Recombinant Protein ◽  
Enzyme Replacement Therapy ◽  
Replacement Therapy ◽  
Iron Homeostasis ◽  
Biologically Active ◽  
High Quality ◽  
Enzyme Replacement ◽  
Functional Studies ◽  
Glycosylation Sites ◽  
Human Ceruloplasmin

The ferroxidase ceruloplasmin (CP) plays a crucial role in iron homeostasis in vertebrates together with the iron exporter ferroportin. Mutations in the CP gene give rise to aceruloplasminemia, a rare neurodegenerative disease for which no cure is available. Many aspects of the (patho)physiology of CP are still unclear and would benefit from the availability of recombinant protein for structural and functional studies. Furthermore, recombinant CP could be evaluated for enzyme replacement therapy for the treatment of aceruloplasminemia. We report the production and preliminary characterization of high-quality recombinant human CP in glycoengineered Pichia pastoris SuperMan5. A modified yeast strain lacking the endogenous ferroxidase has been generated and employed as host for heterologous expression of the secreted isoform of human CP. Highly pure biologically active protein has been obtained by an improved two-step purification procedure. Glycan analysis indicates that predominant glycoforms HexNAc2Hex8 and HexNAc2Hex11 are found at Asn119, Asn378, and Asn743, three of the canonical four N-glycosylation sites of human CP. The availability of high-quality recombinant human CP represents a significant advancement in the field of CP biology. However, productivity needs to be increased and further careful glycoengineering of the SM5 strain is mandatory in order to evaluate the possible therapeutic use of the recombinant protein for enzyme replacement therapy of aceruloplasminemia patients.

scholarly journals Toward Engineering the Mannose 6-Phosphate Elaboration Pathway in Plants for Enzyme Replacement Therapy of Lysosomal Storage Disorders

2019 ◽  
Vol 8 (12) ◽  
pp. 2190
Author(s):  
Ying Zeng ◽  
Xu He ◽  
Tatyana Danyukova ◽  
Sandra Pohl ◽  
Allison R. Kermode
Keyword(s):  
Enzyme Replacement Therapy ◽  
Replacement Therapy ◽  
Substantial Reduction ◽  
Cost Effective ◽  
Biologically Active ◽  
Lysosomal Storage ◽  
In Planta ◽  
Enzyme Replacement ◽  
Mannose 6 Phosphate ◽  
Mps I

Mucopolysaccharidosis (MPS) I is a severe lysosomal storage disease caused by α-L-iduronidase (IDUA) deficiency, which results in accumulation of non-degraded glycosaminoglycans in lysosomes. Costly enzyme replacement therapy (ERT) is the conventional treatment for MPS I. Toward producing a more cost-effective and safe alternative to the commercial mammalian cell-based production systems, we have produced recombinant human IDUA in seeds of an Arabidopsis mutant to generate the enzyme in a biologically active and non-immunogenic form containing predominantly high mannose N-linked glycans. Recombinant enzyme in ERT is generally thought to require a mannose 6-phosphate (M6P) targeting signal for endocytosis into patient cells and for intracellular delivery to the lysosome. Toward effecting in planta phosphorylation, the human M6P elaboration machinery was successfully co-expressed along with the recombinant human IDUA using a single multi-gene construct. Uptake studies using purified putative M6P-IDUA generated in planta on cultured MPS I primary fibroblasts indicated that the endocytosed recombinant lysosomal enzyme led to substantial reduction of glycosaminoglycans. However, the efficiency of the putative M6P-IDUA in reducing glycosaminoglycan storage was comparable with the efficiency of the purified plant mannose-terminated IDUA, suggesting a poor in planta M6P-elaboration by the expressed machinery. Although the in planta M6P-tagging process efficiency would need to be improved, an exciting outcome of our work was that the plant-derived mannose-terminated IDUA yielded results comparable to those obtained with the commercial IDUA (Aldurazyme® (Sanofi, Paris, France)), and a significant amount of the plant-IDUA is trafficked by a M6P receptor-independent pathway. Thus, a plant-based platform for generating lysosomal hydrolases may represent an alternative and cost-effective strategy to the conventional ERT, without the requirement for additional processing to create the M6P motif.

Cardiac and motor improvement with enzyme replacement therapy in a patient with infantile-onset Pompe disease

2005 ◽  
Vol 36 (02) ◽  
Author(s):  
M Smitka ◽  
M von der Hagen ◽  
A Kaindl ◽  
C Gilitzer ◽  
J Dumontier ◽  
...  
Keyword(s):  
Enzyme Replacement Therapy ◽  
Replacement Therapy ◽  
Pompe Disease ◽  
Enzyme Replacement ◽  
Motor Improvement

RESPONSE TO ENZYME REPLACEMENT THERAPY IN PATIENTS WITH GAUCHER DISEASE TYPE I

2019 ◽  
Vol 22 (06) ◽  
pp. 103-117
Author(s):  
Mays Al-Tai ◽  
Deia Al-Asady ◽  
Rula Hamid
Keyword(s):  
Enzyme Replacement Therapy ◽  
Replacement Therapy ◽  
Gaucher Disease ◽  
Disease Type ◽  
Type I ◽  
Enzyme Replacement

Two siblings with attenuated MPS II form: Long term enzyme replacement therapy

2021 ◽  
Vol 132 (2) ◽  
pp. S107-S108
Author(s):  
Nato Vashakmadze ◽  
Leyla Namazova-Baranova ◽  
Natalia Zhurkova ◽  
Olga Gordeeva ◽  
Nina Fedorova ◽  
...  
Keyword(s):  
Enzyme Replacement Therapy ◽  
Replacement Therapy ◽  
Enzyme Replacement ◽  
Mps Ii

scholarly journals Development of the “Hamburg Best Practice Guidelines for ICV−Enzyme Replacement therapy (ERT) in CLN2 Disease” Based on 6 Years Treatment Experience in 48 Patients

2021 ◽  
pp. 088307382198915
Author(s):  
Christoph Schwering ◽  
Gertrud Kammler ◽  
Eva Wibbeler ◽  
Martin Christner ◽  
Johannes K.-M. Knobloch ◽  
...  
Keyword(s):  
Patient Safety ◽  
Adverse Events ◽  
Enzyme Replacement Therapy ◽  
Replacement Therapy ◽  
Practice Guidelines ◽  
Best Practice ◽  
Vision Loss ◽  
Neuronal Ceroid Lipofuscinosis ◽  
Enzyme Replacement ◽  
Best Practice Guidelines

Intracerebroventricular enzyme replacement therapy (ICV-ERT) for CLN2 disease represents the first approved treatment for neuronal ceroid lipofuscinosis (NCL) diseases. It is the first treatment where a recombinant lysosomal enzyme, cerliponase alfa, is administered into the lateral cerebral ventricles to reach the central nervous system, the organ affected in CLN2 disease. If untreated, CLN2 children show first symptoms such as epilepsy and language developmental delay at 2-4 years followed by rapid loss of motor and language function, vision loss, and early death. Treatment with cerliponase alfa has shown to slow the rapid neurologic decline. However, the mode of administration by 4 hour-long intracerebroventricular infusions every 14 days represents a potentially greater risk of infection compared to intravenous enzyme replacement therapies. The Hamburg NCL Specialty Clinic was the first site worldwide to perform intracerebroventricular enzyme replacement therapy in children with CLN2 disease. In order to ensure maximum patient safety, we analysed data from our center from more than 3000 intracerebroventricular enzyme replacement therapies in 48 patients over 6 years with regard to the occurrence of device-related adverse events and device infections. Since starting intracerebroventricular enzyme replacement therapy, we have also developed and continuously improved the “Hamburg Best Practice Guidelines for ICV–Enzyme Replacement Therapy (ERT) in CLN2 Disease.” Results from this study showed low rates for device-related adverse events and infections with 0.27% and 0.33%, respectively. Therefore, following our internal procedural guidelines has shown to improve standardization and patient safety of intracerebroventricular enzyme replacement therapy for CLN2 disease.

Description of a patient with infantile onset Pompe disease after 45 months of enzyme replacement therapy

2018 ◽  
Vol 123 (2) ◽  
pp. S124-S125
Author(s):  
Roberto Sandobal Pacheco ◽  
Diana Espinosa Villanueva ◽  
Adriana Alcnatara Salinas ◽  
Jorge A. Romero Ramirez ◽  
Jose Antonio Vasquez Galeana ◽  
...  
Keyword(s):  
Enzyme Replacement Therapy ◽  
Replacement Therapy ◽  
Pompe Disease ◽  
Enzyme Replacement
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